Google enlisted members of the US congress, whose election campaigns it had funded, to pressure the European Union to drop a €6bn antitrust case which threatens to decimate the US tech firm's business in Europe. The coordinated effort by senators and members of the House of Representatives, as well as by a congressional committee, formed part of a sophisticated, multimillion-pound lobbying drive in Brussels, which Google has significantly ramped up as it fends off challenges to its dominance in Europe.